About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Magnetic Materials for Energy and Power Conversion Applications
|
Presentation Title |
Investigation of the Long-Term Thermal Stability of the L1<sub>0</sub> Phase in Ternary Mn-Al-Ga Alloys |
Author(s) |
Torsten Mix, Thomas G. Woodcock |
On-Site Speaker (Planned) |
Torsten Mix |
Abstract Scope |
The intrinsic magnetic properties of the ferromagnetic L1<sub>0</sub> phase in Mn-Al and Mn-Ga alloys make them promising candidates for rare earth free permanent magnets. In the Mn-Al system, the L1<sub>0</sub> phase is metastable and therefore high temperatures lead to decomposition. In the Mn-Ga system the L1<sub>0</sub> phase is thermodynamically stable; however, the global supply of Ga is critical and the raw materials costs are high. A possible solution to these problems may be offered by ternary Mn-Al-Ga alloys.Researches on the ternary alloys showed the possibility to form the L1<sub>0</sub> phase in a wide composition range with intrinsic magnetic properties comparable to the binary systems. The thermal stability of the L1<sub>0</sub> phases was investigated at 700°C in a series of heat treatments up to 14 days, showing that the thermal stability of the L1<sub>0</sub> phase in the Mn-Al system can be improved with small additions of Ga. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |